Question

what is the missing coefficient to make a balanced equation? o₂ + 2c → ?co 1 3 4 2

Explanation:

Step1: Count oxygen atoms on left - hand side

There are 2 oxygen atoms in $O_2$.

Step2: Count carbon atoms on left - hand side

There are 2 carbon atoms in $2C$.

Step3: Balance the equation for carbon and oxygen

Each $CO$ has 1 carbon and 1 oxygen atom. To balance 2 carbon and 2 oxygen atoms on the left - hand side, we need 2 moles of $CO$.

Answer:

D. 2